JP2002353702A - High frequency rotation relay circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency rotation relay circuit the transmission characteristic of which is not changed even when one coaxial line is rotated in the connection between coaxial lines and the transmission characteristic of which is less changed even on the occurrence of a position deviation. SOLUTION: The high frequency rotation relay circuit is provided with a 1st outer conductor 1a with a torus cross section, a 1st inner conductor 2a that is placed inside on a center axis line of the 1st outer conductor 1a and has a cylindrical hole 50 at the tip, a 2nd outer conductor 1b with a center axis line coincident with the center axis line of the 1st outer conductor 1a that has a torus cross section, a 2nd inner conductor 2b that is placed inside on the center axis line of the 2nd outer conductor 1b and has a cylindrical projection 51 opposed with a gap to the inside of the hole 50 at the tip and concentric to the hole 50, and a bearing 5 and a dielectric sheet 6 that are placed between the 1st outer conductor 1a and the 2nd outer conductor 1b and connected to at least either of the 1st outer conductor 1a and the 1st inner conductor 2a, and 2nd outer conductor 1b and the 2nd inner conductor 2b turnably around the center axis line of them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency rotary relay circuit in which coaxial lines are non-contact-coupled.

[0002]

2. Description of the Related Art FIG. 15 is a block diagram of a high-frequency rotary relay circuit disclosed in Japanese Patent Application Laid-Open No. 3-41801, and FIG.
FIG. 17 is a plan view of a second printed circuit board of FIG.
FIG. 3 is a plan view of a printed circuit board. The high-frequency rotary relay circuit includes a first coaxial line 12a and a second coaxial line 12b that face each other and are rotatable in opposite directions as indicated by arrows in FIG. First coaxial line 12
a is an external reference potential portion 16a and an external reference potential portion 16a
And a printed circuit board 20a connected concentrically to the center of the signal path 14a and a leading end of the signal path 14a. The second coaxial line 12b includes an external reference potential portion 16b, a signal path 14b concentrically arranged at a center position of the external reference potential section 16b, and a printed circuit board 20b connected to a distal end of the signal path 14b. It has. The printed board 20a and the printed board 20b face each other while maintaining a predetermined interval. On the surface of the printed circuit board 20a, a spirally formed inductance element 18a having a length of 1/4 of the propagation wavelength is arranged substantially perpendicular to the signal path 14a. On the surface of the printed circuit board 20b, an inductance element 18b formed in a spiral shape and having a length of 1/4 of the propagation wavelength is provided with a signal path 14b.
Are arranged almost vertically. These inductance elements 18a and 18b are provided on the printed circuit boards 20a and 20b as shown in FIGS.
a and 19b are formed spirally in the same winding direction. The distal ends of the signal paths 14a and 14b are connected to the central portions 19 of these inductance elements 18a and 18b.
a, 19b.

In the high-frequency rotating relay circuit having the above-described configuration, the inductance element 18 having a length of 1/4 of the propagation wavelength is used.
Since a and 18b face each other at a predetermined interval, they are electromagnetically coupled in a frequency band giving a predetermined propagation wavelength,
The high-frequency signal input from one coaxial line 12a is output to the other coaxial line 12b without being reflected.

[0004]

In the conventional high frequency rotary relay circuit, the spiral inductance element 18a,
Although the structure is such that the electromagnetic fields 18b face each other and are electromagnetically coupled, there are the following problems. I. Since the shapes of the inductance elements 18a and 18b are not rotationally symmetric with respect to the center positions of the external reference potential portions 16a and 16b, the area of the overlapping portion of the facing inductance elements 18a and 18b changes depending on the rotation position, and the transmission characteristics are changed. Change. B. If the spiral-shaped inductance elements 18a and 18b facing each other are displaced due to an assembly error or the like, the area of the overlapping portion between the inductance elements 18a and 18b is reduced, so that the transmission characteristics are changed.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems. In non-contact coupling between coaxial lines, even if one of the coaxial lines is rotated, there is no change in transmission characteristics. It is another object of the present invention to obtain a high-frequency rotary relay circuit in which a change in transmission characteristics is small even when a position shift occurs.

[0006]

According to the present invention, there is provided a high frequency rotary relay circuit comprising: a first outer conductor having an annular cross section;
Provided on and inside the central axis of the first outer conductor,
A first inner conductor having a cylindrical hole at a tip end, and a second outer conductor having a circular cross-section provided with the center axis of the first outer conductor coinciding with the center axis. A conductor, a cylindrical projection provided on and inside the center axis of the second outer conductor, opposed to the tip with a gap between the inside of the hole, and concentric with the hole; Having a second
And the first outer conductor, the first inner conductor, and the second inner conductor are provided between an end of the first outer conductor and an end of the second outer conductor. Connecting means for connecting at least one of the outer conductor and the second inner conductor rotatably about a central axis.

Further, the protrusion is inserted so as to face a section of 伝 搬 of the propagation wavelength in the axial direction inside the hole.

The high frequency rotary relay circuit according to the present invention is provided with a first outer conductor having an annular cross section, and provided on the center axis of the first outer conductor and inside the first outer conductor. A first inner conductor having a circular plate, a second outer conductor having an annular cross section provided with the central axis of the first outer conductor coinciding with the central axis, and 2
A second conductor, which is provided on the center axis and inside of the outer conductor of the second conductor, is opposed to the first disc with a gap at the distal end, is concentric with the first disc, and has a different diameter. A second inner conductor having a disk, and a first inner conductor and a first inner conductor provided between an end of the first outer conductor and an end of the second outer conductor; And connection means for connecting at least one of the second outer conductor and the second inner conductor rotatably about a central axis.

Further, a first inductance element is provided between the first inner conductor and the first outer conductor.

[0010] A second inductance element is provided between the second inner conductor and the second outer conductor.

Further, the first inductance element has a first inductance element.
Is a spiral-shaped conductor connected between the inner conductor and the first outer conductor.

Further, the second inductance element has a second inductance element.
Is a spiral-shaped conductor connected between the inner conductor and the second outer conductor.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. In each embodiment, the same or equivalent members and portions are denoted by the same reference numerals. Embodiment 1 FIG. 1 is a cross-sectional view of a main part of a high-frequency rotary relay circuit according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the high-frequency rotary relay circuit of FIG. 1 taken along line II-II, and FIG. FIG. 3 is an equivalent circuit diagram in a predetermined frequency band of the high-frequency rotating relay circuit shown in FIG. In FIGS. 1 and 2, 1a
Is a first outer conductor having an annular cross section having an inner diameter d1, 1b is a second outer conductor having an annular cross section having an inner diameter d1 ', 2a is provided inside the first outer conductor 1a. The first inner conductor 2b having an outer diameter d2, the second inner conductor 2b having an outer diameter d2 'provided inside the second outer conductor 1b, and 3a having a cutout hole 50 having an inner diameter d3. The tip of the first inner conductor 2a, 3b is the tip of the second inner conductor 2b having a projection 51 with an outer diameter d3 ', and 5 is the first outer conductor 1
The bearing 6 is provided between the inner peripheral edge of the first outer conductor 1a and the outer peripheral edge of the second outer conductor 1b, and is a connection means formed of a spherical dielectric. 2 is an annular dielectric sheet as a connection means provided between the outer conductor 1b and an end face of the outer conductor 1b. The inner diameter d3 of the hole 50 of the first inner conductor 2a is equal to the outer diameter d of the protrusion 51 of the second inner conductor 2b.
3 ′, the axial length of the hole 50 of the first inner conductor 2a is longer than the axial length of the protrusion 51 of the second inner conductor 2b.

The high-frequency rotating relay circuit having the above-described configuration includes a first coaxial line 4a in which a first outer conductor 1a and a first inner conductor 2a are concentrically arranged on a center axis A, and a second outer conductor 1a. Conductor 1
b and a second coaxial line 4b formed by concentrically arranging the second inner conductor 2b on the central axis A are connected via a bearing 5 and a dielectric sheet 6. The projections 5 of the second inner conductor 2b are inserted into the holes 50 of the first inner conductor 2a.
The non-contact coupling portions of the high-frequency rotary relay circuit are configured such that the non-contact portions 1 are opposed to each other in a concentric positional relationship without contact and over a length L in the axial direction.

A bearing 5 and a dielectric sheet 6 are sandwiched between the inner end of the first outer conductor 1a and the outer end of the second outer conductor 1b, and the first coaxial line 4a,
The second coaxial line 4b is relatively rotatable about a center axis A. Here, the length PP 'of the gap between the first outer conductor 1a and the second outer conductor 1b sandwiching the bearing 5 and the dielectric sheet 6 (the inner end face P of the dielectric sheet 6 and the bearing 5). Toroidal support 5 for supporting
2) is 外側 of the propagation wavelength.
In the frequency band that gives a predetermined propagation wavelength, the first outer conductor 1a
And the second outer conductor 1b are electrically short-circuited.

The characteristic impedance Zo1 of the first coaxial line 4a is determined by the inner diameter d1 of the first outer conductor 1a and the outer diameter d2 of the first inner conductor 2a. The characteristic impedance Zo2 of the second coaxial line 4b is determined by the inner diameter d1 'of the second outer conductor 1b and the outer diameter d2' of the second inner conductor. Here, it is assumed that Zo1 = Zo2 = Zo. In the non-contact coupling portion of the high-frequency rotary relay circuit formed by the hole 50 of the first inner conductor 2a and the protrusion 51 of the second inner conductor 2b, the inner diameter d3 of the hole 50 of the first inner conductor 2a is The capacitance Cu per unit length is determined from the outer diameter d3 ′ of the protrusion 51 of the second inner conductor 2b. When the length L at which the hole 50 and the protrusion 51 oppose each other in the axial direction is sufficiently shorter than the propagation wavelength, the value of the capacitance C of the non-contact coupling portion is Cu × L. FIG. 3 shows the above in an equivalent circuit diagram.

Next, the operation of the high-frequency rotary relay circuit having the above configuration will be described. The high-frequency signal input from the first coaxial line 4a is output to the second coaxial line 4b via a non-contact coupling portion having a capacitance C. At this time, when the first coaxial line 4a is fixed and the second coaxial line 4b is rotated about the central axis A, the non-contact coupling portion is formed concentrically with the central axis A, and the rotation angle Irrespective of this, a constant capacitance C is maintained. Therefore, constant transmission characteristics independent of the rotation angle can be obtained. Also, if any of the distal ends 3a, 3b of the inner conductors 2a, 2b is displaced in the radial direction from the center axis A due to an assembly error or the like, a portion approaching in the distance between the hole 50 and the protrusion 51 is At the same time, a portion that is far away is also generated, so that a change in the capacitance Cu per unit length of the non-contact coupling portion is small. Therefore, stable transmission characteristics can be obtained.

In this embodiment, the hole 50 of the first inner conductor 2a and the columnar projection 51 of the second inner conductor 2b are opposed to each other by a length L in the axial direction and are contactlessly connected. By forming the part, the transmission characteristic becomes rotationally symmetric about the center axis A. For example, even if the first coaxial line 4a is fixed and the second coaxial line 4b is rotated, the transmission characteristics do not change. Also,
Since the coupling state hardly changes even when the inner conductors 2a and 2b are displaced, stable transmission characteristics can be obtained in a predetermined frequency band.

Embodiment 2 FIG. FIG. 4 is a side sectional view of a main part of a high frequency rotary relay circuit according to a second embodiment of the present invention, and FIG. 5 is an equivalent circuit diagram of the high frequency rotary relay circuit of FIG. 4 in a predetermined frequency band. In the present embodiment, the length L in the axial direction of the non-contact coupling portion of the high frequency rotation relay circuit by the hole 50 of the first inner conductor 2a and the projection 51 of the second inner conductor 2b is determined by the propagation wavelength. The length is set to 1/4. When the length L of the non-contact coupling portion becomes not negligible with respect to the propagation wavelength, an equivalent circuit of the non-contact coupling portion is represented by two open-ended stubs 7 having a length L and facing each other, as shown in FIG. You. In this embodiment, since the length L of the non-contact coupling portion is set to の of the propagation wavelength, the non-contact coupling portion performs electromagnetic field coupling in a frequency band that provides a predetermined propagation wavelength. The high-frequency signal input from the first coaxial line 4a is output to the second coaxial line 4b without being reflected at the non-contact coupling portion.

In this embodiment, the first embodiment
In addition to the same effects as described above, by setting the length L of the non-contact coupling portion to の of the propagation wavelength, there is an effect that a high-frequency signal can be transmitted in a predetermined frequency band without being reflected.

Embodiment 3 6 is a cross-sectional view of a main part of a high-frequency rotary relay circuit according to Embodiment 3 of the present invention, FIG. 7 is a cross-sectional view of the high-frequency rotary relay circuit of FIG. 6, taken along line VII-VII, and FIG. VI of the shown high frequency rotary repeater circuit
FIG. 9 is a cross-sectional view taken along line II-VIII, and FIG. 9 is an equivalent circuit diagram of the high-frequency rotary relay circuit shown in FIG. 6 in a predetermined frequency band. In the figure, 3c is a first disk having a diameter d4 formed at the tip of the first inner conductor 2a, and 3d is a second circle having a diameter d4 'formed at the tip of the second inner conductor 2b. On a board,
The diameter d4 of the first disk 3c is equal to the diameter d of the second disk 3d.
Smaller than 4 '. The first disc 3c and the second disc 3d are opposed to each other on the central axis A at an interval of a distance t without being in contact with each other, and form a non-contact coupling portion. 8b is the second
Is a second inductance element extending spirally from the inner conductor 2b toward the second outer conductor 1b. The second inductance element 8b is formed of a thin wire conductor.

In the non-contact connection portion formed by the first disk 3c and the second disk 3d, the diameter d4 of the first disk 3c and the diameter d4 'of the second disk 3d face each other. The capacitance C is determined from the area and the distance t between the disks 3c and 3d. The inductance L2 of the second inductance element 8b is determined by the shape and length of the helical thin wire conductor, the outer diameter d2 'of the second inner conductor 2b, and the inner diameter d1' of the second outer conductor 1b. . If the above is shown by an equivalent circuit,
As shown in FIG. 9, it is represented by a high-pass filter composed of a capacitance C and an inductance L2.

In the high-frequency rotary relay circuit of this embodiment, the high-frequency signal input from the first coaxial line 4a receives the non-contact coupling portion and the second high-pass filter constituting a high-pass filter.
The second coaxial line 4b via the inductance element 8b
Is output to At this time, the first coaxial line 4a is fixed,
When the second coaxial line 4b is rotated about the central axis A, the two disks 3 forming the non-contact coupling portion are independent of the rotation angle.
Since the facing areas c and 3d do not change, a constant capacitance C is maintained. Also, the second inductance element 8b
Is constant L2 regardless of the rotation of the second coaxial line 4b. Therefore, constant transmission characteristics independent of the rotation angle can be obtained. Further, when any one of the first disk 3c of the first inner conductor 2a and the second disk 3d of the second inner conductor 2b is displaced from the center axis A due to an assembly error or the like, the deviation is small. Within this range, the opposing areas of the two disks 3c and 3d forming the non-contact coupling portion hardly change, so that the change in the capacitance C at the non-contact coupling portion becomes very small. Therefore, stable transmission characteristics can be obtained.

In this embodiment, the first disk 3
c, a high-pass filter is formed by the non-contact coupling portion formed by the second disk 3d and the spiral second inductance element 8b, and the first coaxial line 4a is fixed;
Even if the second coaxial line 4b is rotated, the transmission characteristics do not change, and the coupling state hardly changes due to the displacement between the inner conductors 2a, 2b, so that the high-frequency signal in a predetermined frequency band is more reflected. Without doing so, stable transmission can be achieved.

Embodiment 4 FIG. 10 is a sectional side view of a main part of a high-frequency rotary relay circuit according to Embodiment 4 of the present invention.
1 is a cross-sectional view of the high-frequency rotary relay circuit shown in FIG. 10 along the line XI-XI, and FIG. 12 is an equivalent circuit diagram in a predetermined frequency band of the high-frequency rotary relay circuit shown in FIG.
In this embodiment, a first inductance element 8a formed by a thin wire conductor spirally extending from the first inner conductor 2a to the first outer conductor 1a is added to the high-frequency rotary relay circuit of the first embodiment. Is attached.

The inductance L1 of the first inductance element 8a is determined by the shape and length of the spiral wire conductor, the outer diameter d2 of the first inner conductor 2a and the inner diameter d of the first outer conductor 1a.
Determined by 1. The non-contact coupling portion has the capacitance C as described in the first embodiment. The above is represented by an equivalent circuit, as shown in FIG. 12, represented by a high-pass filter composed of an inductance L1 and a capacitance C. Therefore, as compared with the high-frequency rotary relay circuit shown in the first embodiment, a high-frequency signal in a predetermined frequency band can be transmitted without being reflected more.

Embodiment 5 FIG. FIG. 13 is a sectional side view of a main part of a high-frequency rotary relay circuit according to Embodiment 5 of the present invention.
4 is an equivalent circuit diagram in a predetermined frequency band of the high-frequency rotary relay circuit shown in FIG. In this embodiment,
A second inductance element 8b formed by a fine wire conductor spirally extending from the second inner conductor 2b to the second outer conductor 1b is added to the high-frequency rotary relay circuit shown in the fourth embodiment. I have. As shown in FIG. 14, the equivalent circuit is represented by a high-pass filter including inductances L1 and L2 and a capacitance C. Therefore, compared to the high-frequency rotary relay circuit shown in the fourth embodiment, a high-frequency signal in a predetermined frequency band can be transmitted without being reflected more.

[0028]

As described above, according to the high-frequency rotary relay circuit of the present invention, the first high-frequency rotary relay circuit having the annular cross-section
An outer conductor, a first inner conductor provided on and inside the center axis of the first outer conductor, and having a cylindrical hole at a tip end, and the center axis of the first outer conductor. A second outer conductor having a center axis aligned with the second outer conductor having an annular cross section, and a second outer conductor provided on the center axis of the second outer conductor and inside the second outer conductor; A second inner conductor having a columnar projection facing the inside with a gap therebetween and concentric with the hole; an end of the first outer conductor and an end of the second outer conductor; Connecting means provided between the first and second outer conductors, the first inner conductor, and at least one of the second outer conductor and the second inner conductor rotatably about a central axis. And the first
Since the hole of the inner conductor and the projection of the second inner conductor are rotationally symmetric about the central axis, even if the first coaxial line and the second coaxial line are relatively rotated, the transmission is performed. The effect is that the characteristics do not change. Further, since the coupling state of the non-contact coupling portion hardly changes even when the inner conductors are displaced, stable transmission characteristics can be obtained in a predetermined frequency band.

Also, since the protrusion is inserted in the hole so as to face a section of 1/4 of the propagation wavelength in the axial direction, electromagnetic coupling is performed at the non-contact coupling portion, and in the predetermined frequency band, In addition, high-frequency signals can be transmitted without being reflected.

According to the high frequency rotary relay circuit of the present invention, the first outer conductor having an annular cross section is provided on the center axis of the first outer conductor and inside thereof, and is provided at the tip end. A first inner conductor having a first disk, and a second outer conductor having an annular cross-section, wherein the first outer conductor is provided so that the central axis thereof coincides with the central axis thereof, and The second outer conductor is provided on the center axis and inside the second outer conductor. The second outer conductor is opposed to the first disk with a gap at a tip portion, is concentric with the first disk, and has a different diameter. A second inner conductor having a second disk, and a first inner conductor provided between an end of the first outer conductor and an end of the second outer conductor;
And the connecting means connecting at least one of the second outer conductor and the second inner conductor so as to be rotatable about a central axis. When the coaxial line and the second coaxial line are relatively rotated about the center axis, the facing area of the first and second disks constituting the non-contact coupling portion changes regardless of the rotation angle. Therefore, a constant capacitance is maintained and the transmission characteristics do not change. Further, even if one of the first disk of the first inner conductor and the second disk of the second inner conductor is displaced from the center axis line due to an assembling error or the like, the deviation may be within a small range. For example, since the opposing areas of the two disks hardly change, the change of the capacitance becomes very small, and stable transmission characteristics are secured in a predetermined frequency band.

Also, since the first inductance element is provided between the first inner conductor and the first outer conductor, a high-pass filter having a desired capacitance and a desired inductance can be easily formed. And a high-frequency signal in a desired frequency band can be transmitted without being reflected more.

Also, since the second inductance element is provided between the second inner conductor and the second outer conductor, a high-pass filter having a desired capacitance and a desired inductance can be easily formed. And a high-frequency signal in a desired frequency band can be transmitted without being reflected more.

The first inductance element has a first inductance element.
Since the spiral conductor is connected between the inner conductor and the first outer conductor, a desired inductance can be obtained with a simple configuration.

The second inductance element has a second inductance element.
Since the spiral conductor is connected between the inner conductor and the second outer conductor, a desired inductance can be obtained with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a main part of a high-frequency rotary relay circuit according to a first embodiment of the present invention.

FIG. 2 is a II-I of the high-frequency rotating relay circuit shown in FIG. 1;
It is sectional drawing along the I line.

FIG. 3 is an equivalent circuit diagram of the high-frequency rotary relay circuit shown in FIG. 1;

FIG. 4 is a side sectional view of a main part of a high-frequency rotary relay circuit according to a second embodiment of the present invention.

5 is an equivalent circuit diagram of the high-frequency rotary relay circuit shown in FIG.

FIG. 6 is a side sectional view of a main part of a high-frequency rotary relay circuit according to a third embodiment of the present invention.

7 is a VII- of the high-frequency rotary relay circuit shown in FIG. 6;
It is sectional drawing which followed the VII line.

FIG. 8 is a view VIII of the high-frequency rotary relay circuit shown in FIG. 6;
It is sectional drawing of the -VIII line.

9 is an equivalent circuit diagram of the high-frequency rotary relay circuit shown in FIG.

FIG. 10 is a side sectional view of a main part of a high-frequency rotary relay circuit according to a fourth embodiment of the present invention.

FIG. 11 shows the XI of the high-frequency rotary relay circuit shown in FIG.
It is sectional drawing which followed the -XI line.

12 is an equivalent circuit diagram of the high-frequency rotary relay circuit shown in FIG.

FIG. 13 is a side sectional view of a main part of a high-frequency rotary relay circuit according to a fifth embodiment of the present invention.

FIG. 14 is an equivalent circuit diagram of the high-frequency rotating relay circuit shown in FIG.

FIG. 15 is a schematic configuration diagram illustrating an example of a conventional high-frequency rotary relay circuit.

FIG. 16 is a plan view of the printed circuit board of FIG.

FIG. 17 is a plan view of the printed circuit board in FIG. 15;

[Explanation of symbols]

1a first outer conductor, 1b second outer conductor, 2a first
Inner conductor, 2b second inner conductor, 3a, 3b tip, 3
c 1st disk, 3d 2nd disk, 4a 1st coaxial line, 4b 2nd coaxial line, 5 bearing (connection means), 6 dielectric sheet (connection means), 8a 1st inductance element , 8b a second inductance element,
50 holes, 51 protrusions.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Miya ▲ Saki ▼ Mamoru ▲ Tai ▼ 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Corporation (reference) 5E070 AA01 CB01 5J011 EA02

Claims (7)

[Claims] A first outer conductor having an annular cross section, provided on a center axis of the first outer conductor and inside the first outer conductor;
A first inner conductor having a cylindrical hole at a distal end thereof, and a second outer conductor having a central section line with the center axis of the first outer conductor and having an annular cross section. A conductor, a cylindrical projection provided on and inside the central axis of the second outer conductor, opposed to the tip with a gap between the inside of the hole, and concentric with the hole; A second inner conductor having the first outer conductor and the first inner conductor, provided between an end of the first outer conductor and an end of the second outer conductor. A high frequency rotary relay circuit comprising: a connecting means for rotatably connecting at least one of the second outer conductor and the second inner conductor about a central axis. 2. The high-frequency rotary relay circuit according to claim 1, wherein the projecting portion is inserted inside the hole so as to face a section of １ ／ of the propagation wavelength in the axial direction. 3. A first outer conductor having an annular cross section, provided on and inside a central axis of the first outer conductor,
A first inner conductor having a first disk at a distal end thereof, and a second outer conductor having a circular cross section, wherein the center axis of the first outer conductor is provided so as to coincide with the center axis thereof. A conductor, provided on the inner side of the center axis of the second outer conductor and facing the first disk with a gap at the tip and concentric with the first disk; and A second inner conductor having a second disk having a different diameter, provided between an end of the first outer conductor and an end of the second outer conductor, the first outer conductor and A high-frequency rotary relay circuit comprising: the first inner conductor; and connection means for connecting at least one of the second outer conductor and the second inner conductor to be rotatable about a central axis. 4. The high frequency rotary relay circuit according to claim 1, wherein a first inductance element is provided between the first inner conductor and the first outer conductor. 5. The high-frequency rotary relay according to claim 1, wherein a second inductance element is provided between the second inner conductor and the second outer conductor. circuit. 6. The high-frequency rotary relay circuit according to claim 4, wherein the first inductance element is a spiral-shaped conductor connected between the first inner conductor and the first outer conductor. 7. The high-frequency rotary relay circuit according to claim 5, wherein the second inductance element is a spiral-shaped conductor connected between the second inner conductor and the second outer conductor.